I am using Pennzoil but i have heard that the new hm has a weak add package... I don't know how true this is but what hm oil does everyone here use when it comes to high mileage oil..i like pennzoil and maybe valvoline but i can't find a spec sheet on these oils..
I use hm oil in some of my older engines and i like it as lot
I use hm oil in some of my older engines and i like it as lot